test: fix import errors after views.py split

- Fix IndentationError in test_poll_complete.py (remove duplicate lines)
- Fix ImportError in test_ldap_optional_helpers.py (update import path to _helpers module)

Tests now collect 515 items without collection errors.
11 pre-existing test failures remain (auth registration issues unrelated to refactoring).

backend/tests/api/v1/communications/test_poll_complete.py

@@ -644,8 +644,3 @@ class TestPollEdgeCases:
 
         # total_voters должен быть 1, не 2
         assert response.data['results']['total_voters'] == 1
-            url, {'option_ids': [opt1.id, opt2.id]}, format='json'
-        )
-
-        # total_voters должен быть 1, не 2
-        assert response.data['results']['total_voters'] == 1

backend/tests/api/v1/employees/test_ldap_optional_helpers.py

@@ -8,7 +8,7 @@ import pytest
 from unittest.mock import Mock
 from rest_framework.response import Response
 
-from api.v1.employees.views import _is_ldap_enabled, _ldap_try
+from api.v1.employees.views._helpers import _is_ldap_enabled, _ldap_try
 from employees.ldap.errors import (
     DirectoryLdapError,
     DirectoryServiceError,